Water Filter Housings – Inline Filter Housing

What is a water filter housing?

The housing for water filter cartridges (also known as the body) is an essential component of every filter. It can be mounted directly on the water installation pipe or as a set, creating a water filtration station.

A complete water filter consists of two main parts – the described body and the filter cartridge.

Water filter housings available at MojaWoda.com

At MojaWoda.com, you will find water filter housings (including reverse osmosis membranes) from many well-known brands. Among the available products are models from reputable brands such as wodaRO and Aquafilter.

Are you looking for the highest quality accessories for water filters? Check out our offer and choose the housing that interests you! You won't be disappointed!

Why does a solid water filter housing protect your treatment system?

A well-chosen pipe filter housing creates a tight, pressure-resistant "socket" for the filter cartridge. This is where the water first changes its flow path – if the housing is too weak, the entire installation loses efficiency and safety.

What does a strong housing provide?

• Stable pressure – no uncontrolled drops and risk of bursting.

• Protection of the cartridge – the cartridge operates evenly, without bypass phenomena.

• Easy serviceability – quick unscrewing of the cover without specialized tools.

• Longer system lifespan – fewer failures, fewer costly downtimes.

Types of water filter housings and their applications

The offer is wide, as each installation requires a different flow rate and thread type. Below you will find the most popular variants and hints on where they work best.

1” water filter housing

The most popular 1″ thread provides a high flow rate (30–50 l/min), which is why it is used at the water inlet to the house or in small guesthouses. The internal diameter allows the use of large sediment and carbon cartridges without pressure drop.

¾” water filter housing

The ¾″ thread is a golden mean – sufficient for most apartments and smaller houses. It works well as a pre-filter before a water softener or as a single barrier before the drinking water tap.

½” water filter housing

A solution less commonly found in pipe installations. The small thread protects point-of-use devices: washing machines, coffee machines, or water dispensers.

¼” water filter housing

The ¼″ diameter is standard in reverse osmosis systems. The small thread fits thin RO hoses, and the cover will fit easily under the sink.

Plastic, stainless steel, and brass filter housings – pros and cons

Transparent filter cover or blue? When each solution makes sense

• Transparent cover allows you to quickly assess the degree of contamination of the mechanical cartridge (string, foam). It works well in places shielded from light.

• Blue cover blocks UV rays, thus preventing algae growth where the housing is located in a brighter room or a boiler room with a window. It also protects carbon cartridges from photo-oxidation.

Dimensions and sizes of housings

The housing must fit not only the thread but also the length of the cartridge. Below are the most commonly encountered configurations.

10” water filter housing – the most common size in single-family homes

The universal 10″ accepts 99 % of cartridges available on the market, making it easy to change filter media without replacing the housing.

10” BigBlue water filter housing – stronger filtration

The BigBlue 10″ series has a larger diameter, allowing for thicker layers of media and lower pressure drops. Ideal when the water requires intensive iron removal or deep softening.

20” filter housing, 20” BigBlue, 5” – less popular solutions

• 20″ and 20″ BigBlue – double capacity compared to 10″; used when there is no space for a ion-exchange softener or no drain for brine.

• 5″ – very compact and half the size of standard 10" housings - today practically unused in Poland due to limited availability of replacement cartridges.

When is it better to choose a larger Big Blue model?

Opt for BigBlue when:

• water consumption exceeds 5000 l per month,

• pressure in the installation is high (above 4 bar) and you want to avoid drops,

• you need specialized cartridges (iron removal, manganese removal, multi-layer media, strong water softening)

• you plan infrequent servicing – a larger cartridge maintains performance longer.

Multi-stage configurations

Triple water filter housing – three stages in one frame

The 3-stage water filter housing allows for the installation of sediment, activated carbon, and ion-exchange media cartridges in one frame – maximum protection with minimal space.

4-stage water filter housing

The fourth housing allows adding an iron-removing or antibacterial module, which will be appreciated by owners of deep wells and networks with elevated iron levels.

Single and double water housings

One or two housings create basic filtration: sediment before the meter in the house or pre-filter before the softener. Thanks to the modular design, you can expand them with additional stages.

How to choose a water filter housing step by step

Choosing is not difficult if you proceed methodically. Below is a quick cheat sheet – and if doubts arise, write or call us, we are happy to help.

Check-list for diameter, thread, and budget – choosing a water filter housing

1. Check the thread on the pipe – you will most often find the designation 1″, ¾″ or ½″ embossed on the fitting.

2. Measure the clearance under the housing – leave at least 10 cm for unscrewing the cover.

3. Determine water consumption – the higher the flow, the larger the housing makes sense (e.g., BigBlue).

4. Examine water parameters – high iron? An iron-removing cartridge and a 20″ housing will be useful.

FAQ – frequently asked questions about filter housings

• How to check the maximum pressure?
  Read the "Max Pressure" value from the label or product card and compare it with the working pressure indicated in your installation (usually a reading from the manometer at the pressure tank or pressure reducer). If both parameters are close, consider installing a reducer or a larger housing.

• How to replace the water filter housing?
  Shut off the main valve, release the pressure, unscrew the old housing with a housing wrench, and if necessary, lubricate the gasket with petroleum jelly.

• How to loosen a stuck water filter housing?
  Use a dedicated wrench and apply steady pressure; if the gasket has "suctioned" itself, gently tap the housing with a rubber mallet to break the vacuum.

• Does the water filter housing fit every cartridge?
  Yes, as long as the length and diameter of the cartridge match the specifications (e.g., 10″ Slim or 10″ BigBlue). Always check this information in the product description.

• How often should the gasket in the housing be replaced?
  When you notice flattening, cracks, or leaks after replacing the cartridge.

Check the full offer of water filter housings in our store

Browse all models of water filter housings – from compact ¼″ to industrial 20″ BigBlue. Each housing has a detailed description of parameters and compatible cartridges, and our team of advisors is ready to help you choose the perfect solution. Order today, and we will ship within 24 hours!

Text from 02.07.2025